Book-sewing machine.



L. EGGER. L BOOK SEWING MACHINE. APPLICATION FILED AUG. 29, 1910.

Patented July 23,1912.

' 2 SHEETS-811113132.

LOUIS EGGER, F BRUG-GEN- ST. GALLEN, SWITZERLAND.

BOOK-SEWING MACHINE.

To all whom it may concern:

Be it known that I, Louis EGGER, engineer, residing at Bruggen-St.Gallen, Switzerland, have invented certain new and useful Improvementsin Book-Sewing Machines; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to machines for sewing books; and it consistschiefly in arranging the main driving shaft with its operating cams andconnections above the level of the receiving table for the sewed sheets,and in certain other novel features of construction hereinafter fullydescribed and claimed.

In the drawings, Figure 1 is a front elevation and Fig. 2 a sideelevation of the machine. Fig. 3 is a cross-section through the upperportion, and Fig. 4 a front elevation of the same portion of themachine, partly in section. Fig. 5 is a plan of the above mentionedtoothed wheel gear for operating the thread stretching device androtating the hooked needles.

This machine has eye needles and hook needles arranged in pairs andsupported in heads 50 and 48 respectively. A base plate 75 and two sidestandards 6 and 7 are provided. The receiving table 73 for the sewedsheets is supported between the standards 6 and 7, and the main drivingshaft or spindle 13 is arranged considerably above the table 73 and alittle above the line 84 which indicates the top of the sheets wheresewn together to form the back of the book.

The shaft 13 has a disk 11 provided with three cam surfaces secured onits left hand end, and on its right hand end adisk 12 is secured whichis provided with two cam surfaces. The disk 12 has gear teeth on itsperiphery which gear into atoothed wheel 85 of the same diameter. Thetoothed wheel 85 is journaled on a pin 86 which projects from thestandard 7 and it carries the cams 36 and 45.

The spreading table consists of two plates 1 and 2 and two levers 3 and4 carrying the said plates and pivoted about a spindle 5 mounted in twobearings 78 and 79. For moving the said table, to the levers 3 and 4Specification of Letters Patent. Application filed August 29,

are pivoted rods 8 and 8 connected to le- Patented July 23, 1912. 1910.Serial No. 579,385.

vers 9 and 10 operated by the cam disks 11 and 12 secured to thehorizontal shaft 13 mounted in the standards or brackets 6 and 7.

The levers 9 and 10 are pivoted to a spindle 14 (Figs. 1 and 2).

On the pivoted table is mounted the thread guide as well as theperforator. The former consists of a longitudinally adjustablehorizontal rod 15 mounted in the two table levers 3 and 4, the hooks 16being secured to the said rod 15. This thread guide is operated by meansof a double lever 17 pivoted to the bracket 80, and of cam 18 acting onthe said double lever. A spring not shown in the drawing, pulls the rod15 to the left hand side in such manner that the roller 19 is alwaysheld in engagement with the cam disk 11 (Figs. 1 and 2). I

The perforator or apparatus for the preliminary perforation, consists ofa bar 20 provided wit-h smooth needles or pins 22 and mounted in avertically adjustable manner in the guides 21 and 21. For moving the bar20, connecting rods 23 and 23 engage with it, and are connected tolevers 25 and 25 secured to a spindle 24 mounted on the levers 3 and 4parallel to the shaft 5. To the spindle 24 is further secured a lever 26engaging with the fork 27 ofthe lever 28. The latter is secured by meansof a spindle 29 rotatably mounted in the standard 6, to the lever 30,and is operated from the cam disk 11 (Figs. 1 and 2).

In the outer position of the table (shown in chain dotted lines in Fig.2), the device for the preliminary perforations is no longer connectedto the lever 28, while the lever 26 in the inner position of thespreading table (in which the sheet to be sewn or stitched on, is underthe sewing needles), is again in engagement with the fork 27 of thelever 28. In the lateral standards 6 and 7 is rotatably mounted aspindle 81 for the parts for stretching the thread, and a spindle 3l'foroperating the sheet taking ofi device. To the spindle 81 are secured twoarms 32 and 33 connected together by means of across bar 34 and operatedfrom the cam disk 36 by means of a lever secured to the spindle 81(Figs. 1 and 2). The sheet stripping off device consists of two levers37 and 37 se cured to the spindle 31, connected together by means of across-bar 38 and operated from the lever 9 which acts by means of aconnecting rod 40 on the lever 46 secured to the spindle 31.

In the bearings arranged on both sides of a cross-bar 41 secured to thelateral stand ards 6 and 7, is rotatably mounted the spindle 42 foroperating the clamping jaws 4?) intended for temporarily jamming thethread and screwed to the cross-bar 41. To the spindle 42 are securedthe two levers and 82 which by means of a lever 44 secured to the saidspindle,

them and is grasped by cam 45 moves the lever 44 them lease of thethread.

To a cross-bar 46 justable in the guides 47 and 47, are secured thesewing or stitching heads 48 in which are rotatably mounted the mandrels55 carrying the hooked needles. In the crossbar 46 is mounted ahorizontal, longitudinally adjustable bar 49 to which are secured thesewing heads 50 carrying the eye needles. For vertically reciprocatingthe bar 46, it is connected to rods 51 and 51 which are connected tolevers 53 and 53 secured to a spindle 52 mounted in the lateral.standards 6 and 7 To the spindle 52 is further secured a lever 54operated by the cam disk 12 (Figs. 1-4).

The rotation of the hooked needles is ef-.

fected by means of toothed wheels 56 secured to the mandrels 55, and ofa horizontally adjust-able tooth rack 83 mounted on the cross bar 46, anarm 58 carrying a roller 57 being secured to the said tooth rack 83, andoperated by the cam 59 (Figs. 3 and 4). The roller 57 is held inengagement with the cam 59 by means of a spring not shown in the drawingand constantly pulling the tooth rack 83 to the right. The cam 59 ismade spiral in such manner that during the vertical reciprocation of thecross-bar 46, the tooth rack 83 can be horizontally moved.

For making the zigzag stitch, the bar 49, and therefore the sewing heads50 secured to it, together with the eye needles, are horizontally moved.The bar 49 receives its movements by means of a cam disk 60 driven bymeans of toothed wheels 61 and 62 and traveling at half the speed of themain spindle 13 carrying the cam disks 11 and 12. The cam disk 60 actson the guide 63 horizontally adjustable on the spindle 14 and carryingat one end the arm 64 provided with a fork 68, and at the other endsecured to a ring 66 carrying the roller 65, owing to a pressure spring67 constantly pressing the and of a cam disk 5 45 acting on the saidlever, close or open the 3 The 1 clamping jaws 1-3 are of any approvedconj the thread is placed between i When the I and the arm 82 in onedirection, the said arm 82 operates one of the clamping aws so as toeffect the reroller 65 against the cam disk 60. The fork 68 in its turnengages over a roller 69 mounted on a bolt 70 passing through theslotted cross-bar 46 and secured to the bar 49 (Figs. 3 and 4).

If the so-called brochure stitch is to be made, the lateral shifting ofthe guide 63 is prevented by the introduction of the pin 71., so thatthe eye needle always stitches at the same point (Figs. 3 and 4).

Y3 is a sheet metal table on which restthe sheets 74 sewn or stitchedtogether. According to the size of the book to be sewn or stitched, thesaid table is placed at a higher or lower level by means of the spindle7 6 guided in the table plate 75, and of the hand wheel 77 (Figs. 1 andThe working of the machine described is as follows: the sheet 72 to besewn or stitched on, is placed on the spreadingtable 1 which is in heouter position shown by which 1s vertlcally ad- 1 chain. dotted lines inFig. 2. After the spreading table has brought the sheet 72 under thestitching needles, the sheet is perforated by the perforator pins 22 andthrough the holes produced, pass the eye needles introducing the thread,and at the same time also the hooked needles with their hooks facingforward. The thread guide 16 will then seize the thread introduced bythe eye needle, bring it in front of the hooked needles which in themeantime have been turned to an angle of 180 and will introduce it intothe latter. During the upward movement of the needles, the threadbrought by the thread guide 16, will be seized by the hooked needle, andthe thread loop seized will be drawn through the loop of the sheet sewnon before, which loop surrounds the hooked needle, whereupon the hookedneedle is again turned to 180.

During the above process, the thread stretching device acts on thethread so that the latter is kept taut. After the thread guide hasreturned to its normal position laterally of the eye needle, thespreading table will swing again into the outer position shown in chaindot-ted lines in Fig. 2, while the sheet stripping off bar 38' willpress the projecting branch of the sheet just sewn on, against thesheets sewn on before. A new sheet is then placed again on the spreadingtable, and the above described process repeated.

hat 1 claim is:

1. In a book sewing machine, nation, with a frame, of a driving shaftjournaled in the frame, a face cam 60 journaled in the frame, drivingwheels for revolving the said face cam from the said driving shaft butat a slower speed, a crossbar 46 carried by the frame, a bar 49 slidablehorizontally in the said crossbar and provided with. a projecting bolt,a support ing spindle 14 carried by the said frame, a

the combispring-pressed guide 63 slidable on the said spindle andengaging with the said face cam, and an arm secured to the said guideand operatively connected with the said bolt.

2. In a book sewing machine, the combination, with a frame, and acrossbar 46 carried by the frame; of sewing heads 48 se-- cured to thesaid crossbar, mandrels 55 journaled in the sewing heads and providedwith hooked needles, toothed wheels 56 secured to the said mandrels, atoothed rack 83 carried by the said crossbar and gearing into the saidwheels, an arm 58 secured to one end of the said rack and provided witha roller, and a revoluble cam which engages with the said roller andslides the said rack horizontally so that it revolves the said mandrelsat periodic intervals.

3. In a book sewing machine, the combination, with a frame, and acrossbar 46 carried by the frame; of a longitudinally movable bar 49mounted on the said crossbar and provided with a projecting pin 70,sewing heads 50 secured to the bar 49, eyeneedles carried by the saidsewing heads, a

spindle 14 carried by the frame, a springpressed sleeve 63 slidablelongitudinally on the said rod, a forked arm secured to the said sleeveand engaging with the said pin 70, an operating arm also secured to thesaid sleeve, and a revoluble cam 60 engaging wit-h the said operatingarm and sliding the bar 49 periodically.

4. In a book sewing machine, the combination, with a frame, two levershaving their lower ends pivoted to the frame, a spreading table carriedby the said levers, two revoluble cams, a single driving shaft havingthe said cams secured on it, two operating levers having their middleparts engaged by the said cams, and connecting-rods between the adjacentand free end portions of the said operating levers and spreading tablelevers; of a rock-shaft 31 mounted in the frame above the said spreadingtable, stripping-0E device comprising two levers 37 and 37 secured tothe rock-shaft 31 and having their free ends connected together by acrossbar 38, a lever 46 secured to the rock-shaft 31, and aconnecting-rod between the lever 46 and the upper end portion of one ofthe said operating levers which actuate the spreading table.

In testimony whereof I affix my signature, in presence of two witnesses.

LOUIS EGGER.

Witnesses ALwIN FEHVIG, RANDALL ATKINSON.

Copies of this patent may be obtained for five cents each, by addressingthe Washington, D. C.

Commissioner of Patents,

